Qantas/NAB

Here is a deal for you! When Mr Agius of Melbourne, Australia got a letter from the National Australia Bank (NAB) in January, offering him 100 additional points for each eligible purchase made on a NAB Qantas credit card, he went into action. He made 7000 purchases of one cent each – mostly between January 6 and January 9. Most of the purchases were used to top up his CityLink Tollway pass. For the bank had made a fatal error in that they didn’t specify how much you had to spend on each purchase to…